gumby240 Posted March 12, 2009 Share Posted March 12, 2009 Hey I am installing this system (http://www.diyautotune.com/catalog/megasquirtii-ems-system-smd-pcb357-assembled-unit-p-165.html ) in my 240Z. It has the L28et from a 83 280ZX turbo in it, when i ordered it i told them that i was going to use the stock distributor, my question is do i need to use the HEI module to fire the coil and can i use the Z31 coil or can i use a MSD 6al box or do i need both ? Quote Link to comment Share on other sites More sharing options...
mobythevan Posted March 12, 2009 Share Posted March 12, 2009 One option is to use the HEI module to fire the Z31 coil. Quote Link to comment Share on other sites More sharing options...
gumby240 Posted March 12, 2009 Author Share Posted March 12, 2009 Ok cool but would it benefit me more to run the MSD box ? Quote Link to comment Share on other sites More sharing options...
mobythevan Posted March 12, 2009 Share Posted March 12, 2009 I've worked a few cars and I have never seen anything to convince me to run an MSD box. Do they gain you anything? I don't know. If it was me I would spend the money on an EDIS trigger wheel and run LS1 coils wasted spark. I think that would be an improvement over the distributor because it will provide a more consistent spark. I think all you need is the EDIS trigger wheel, VR pickup and LS1 coils. I would not use the EDIS module, just decode the trigger wheel signal directly with megasquirt and mod the three LED circuits to fire the LS1 coils. This seems like the best bang for the buck ignition system for an L engine to me. Quote Link to comment Share on other sites More sharing options...
gumby240 Posted March 12, 2009 Author Share Posted March 12, 2009 Ok thanks, well right now its going to get the HEI module. I am really lost with this system I thought if I ordered a preassembled unit it would make it easier but the more I read about it the more confused I get about what I should be running, configuring, wiring, installing, pretty much every thing. I started out thinking this would be fun, do some wiring, do some tuning, and bam off I go. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted March 12, 2009 Share Posted March 12, 2009 It will be fun, just take your time. Read a lot and ask lots of questions. Start out simple like you say with the HEI module and Z31 coil. Move up later when you understand more. Good Luck Quote Link to comment Share on other sites More sharing options...
gumby240 Posted March 12, 2009 Author Share Posted March 12, 2009 Do i need the ignitor on the side of the coil ? I am assuming no, that's what the HEI module is for right? Quote Link to comment Share on other sites More sharing options...
mobythevan Posted March 12, 2009 Share Posted March 12, 2009 You don't use the ignitor on the side of the coil. The HEI module replaces its function. You are correct. If you have a v3 megasquirt mainboard then you do not need the HEI module if your ignition tranistor is stuffed. You can use the ignition transistor on the mainboard to fire the coil. Check out your board version and stuffing options. Quote Link to comment Share on other sites More sharing options...
gumby240 Posted March 12, 2009 Author Share Posted March 12, 2009 Where do I find that info ? Thanks for your help sorry but i am a complete newbie. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted March 12, 2009 Share Posted March 12, 2009 The following links can be found through http://www.msefi.com Go to the megamanual link: http://www.megamanual.com/mtabcon.htm Go here for v2.2 board assembly instructions: http://www.megamanual.com/v22manual/mass.htm#guide Or here for v3 board assembly instructions. http://www.megamanual.com/ms2/V3assemble.htm Just look around at the megamanual links, there is a ton of info. If you follow some of the links you will find pictures of v2.2 boards and v3 boards to help you ID what you have. If you ordered from diyautotune then your receipt or order form should show you what was ordered v2.2 or v3. I think it is a really good idea for anyone that orders a pre-built board to go through the assembly instructions anyway. Then you'll know what options are available for your board and where all the components are located. It will take some time to learn a lot of this, just stick with it. Quote Link to comment Share on other sites More sharing options...
gumby240 Posted March 12, 2009 Author Share Posted March 12, 2009 Thanks a bunch ! Yeah i went down & got the receipt it says V3.57. I am assuming that is the V3 board, it also says that they modified it for a "single Bosch BIP373 ignition output on pin 36", is that the ignition transistor you are talking about ? Also the injectors i am using are 2.4 ohms so do i need the flyback board ?, cause i was reading somewhere that the V3 came with that. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted March 12, 2009 Share Posted March 12, 2009 You should be set, the v3.57 is just the surface mount component version of the v3 board. Since you have the BIP373 ignition output tranisistor you do not need the HEI module. Also, you can run PWM for your low impedance injectors on v3 and v3.57 boards, you do not need the flyback board like v2.2. You are all set, good deal. Quote Link to comment Share on other sites More sharing options...
gumby240 Posted March 13, 2009 Author Share Posted March 13, 2009 Awesome ! Thanks so much for all the help & the links i learned a ton today, now i just need to do a bunch of sodering ! Quote Link to comment Share on other sites More sharing options...
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